I've been chasing The Redheaded Madman for two months now and, so far, here are the takeaways for me:
In the 1880s virtually all the known world hated Vincent van Gogh's artwork. His own mother called his art "ridiculous" (even after he started to become famous) and he sold only one painting while he lived. Today, of course, his paintings are valued in the hundreds of millions of dollars and he is considered one of the father's of modern art. The VG lesson: Be careful what you condemn.
Two different women remembered van Gogh coming to their house when they were kids and drawing pictures of their families and then leaving the drawings as gifts. In both cases the kids got up the next day and used the paper as kindling for a fire in the fireplace. Those were very expensive fires. The VG lesson: Be careful what you burn (includes bridges).